Safety and Efficacy of Adalimumab in Patients Who Showed an Unsatisfactory Response to Etanercept

Inclusion Criteria

• Subject with plaque psoriasis with documentation of an unsatisfactory response to etanercept as defined by either:
• Failure to present a PGA of clear or almost clear after at least 3 months of etanercept at 50 mg twice a week OR;
• Failure to present a PGA of clear or almost clear after at least 3 months of etanercept at 50 mg twice a week followed by a dose reduction to 50 mg once a week. To be eligible these patients must have reached a PGA of clear or almost clear after at least 3 months of etanercept at 50 mg twice a week followed by a loss of PGA of clear or almost clear at anytime after a dose reduction to 50 mg of etanercept once a week.
• Subject presents a PGA of 3 or more at baseline visit.
• Subject with plaque psoriasis at screening that is severe enough to be candidate for systemic therapy.
• Subject is 18 to 80 years of age .
• Female subject is either not of childbearing potential, defined as postmenopausal for at least 1 year or surgically sterile (bilateral tubal ligation, bilateral oophorectomy or hysterectomy), or is of childbearing potential and practicing one of the following methods of birth control throughout the study and for 150 days after study completion:
• condoms, sponge, foams, jellies, diaphragm or IUD;
• contraceptives (oral or parenteral) for three months prior to study drug administration;
• a vasectomized partner;
• Female subjects of childbearing potential must have a negative serum pregnancy test at the Screening visit.
• Subject is judged to be in good general health as determined by the principal investigator based upon the results of medical history, laboratory profile, physical examination, and CXR performed at Screening.
• Subjects will be evaluated for latent TB infection with a PPD test and CHX. Subjects who demonstrate evidence of latent TB infection (either PPD more than or equal to 5 mm of induration, irrespective of BCG vaccination status and negative CXR findings for active TB, and/or suspicious CXR findings will not be allowed to participate in the study.
• Subjects must be able and willing to provide written informed consent and comply with the requirements of this study protocol.
• Subjects must be able and willing to self-administer SC injections or have a qualified person available to administer SC injections.

Exclusion Criteria

• Subject has other active skin diseases or skin infections (bacterial, fungal, or viral) that may interfere with evaluation of psoriasis or with subject's safety.
• Subject has a history of an allergic reaction or significant sensitivity to constituents of study drug, including latex (a component of the pre-filled syringe).
• Subject who has used topical treatments in the last 4 weeks of the etanercept treatment period when the response to etanercept was evaluated as unsatisfactory must use the same topical therapy with the same agents applied in the same manner and with the same application frequency for two weeks prior to the baseline visit as well as during the entire trial. The use of any other topical treatment for psoriasis is prohibited except for allowed treatments.
• Subject who has used UVB phototherapy, excessive sun exposure, phototherapy or any non-biological systemic therapy for the treatment of psoriasis less than 30 days before day 0. Investigational chemical agents must be discontinued at least 30 days or 5 half-lives prior to the Baseline visit (whichever is longer).
• Subject who has used any biological therapy (apart from etanercept) for the treatment of psoriasis less than 3 months (90 days) before day 0. Etanercept must be discontinued before baseline but a washout period is not required.
• Subject is taking or requires oral or injectable corticosteroids during the study. Inhaled corticosteroids for stable medical conditions are allowed.
• Subjects for whom documentation of unsatisfactory response to etanercept was obtained while the subject was under combination treatment with any of the foll